anti-submarine
adjective
an·ti-sub·ma·rine ˌan-tē-ˈsəb-mə-ˌrēn 
-ˌsəb-mə-ˈrēn,
ˌan-tī-
variants or antisubmarine
: directed against submarines : designed or intended to destroy submarines
anti-submarine warfare
Word History
First Known Use
1900, in the meaning defined above